Device for operating furnace-doors.



c. a. KAHLER. H DEVICE FOR OPERATING FURNACE HOURS, I v APPLICATION FILED NOV. 18, 1909. I

1&46374, Patented Dec. 3, 1912.

CHARLES F. KaHLEIi, OF cLEvE AN joHIo.

L DEVICE FOR OPERATING FURNACE-DOORS.

Specification of Letters Patent.

l Patented Dec. 3; 1912.

Application filed November 18,1909, Serial No. 528,666.

To all whom it may concern:

. Be it known that I, CHARLES F. KAHLER, a citizen of the United states of America, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements 1n Devices for Operating Furnace-Doors; and

. I hereby declare the following to be afail, clear, and exact, description of the invention,

' to which 1t simple and durable mechanism for slmulsuch as will enable others skilledin the art pertains to make and use the same.

This invention relates to improvements in devices for operating furnace doors. The object of this invention is to provide taneou'sly opening and closing furnace doors. A further object of this invention 18. to prfiide mechanism for operating furnace doors which canbe worked by the foot of the fireman -thus enablingthe door to be closed and opened between each shovelf-ul of "coal when filling the furnace.

My. invention, therefore, consists in certain novel details of constructionan'd corn-. binationandarrangeinentof parts herein- '4 afterde'scribed in the specification, pointed out in the claims and illustrated in the accompanying draWings. I

In theac-companying drawlngs Figure; 1

5 is a front view of a portion of a furnace showing the doors equipped with my invention. Fig. 2' is a side View of the same.

, Again referring to the accompanying drawings, 2f represents a portion of a furnace having the usual opening 4- for the admission of fuel and 3' represents the door frame which: is secured to the furnace in any suitable manner around the opening 4'.

Doors 11 and 14' are provided for closing the-opening 4 and are arranged to swing vertically and are mounted as follows. Ex-

' tnding forward fromthe frame 8 near each each upper corner of the opening 4' are brackets 5' and 6' and adjacent to each lower corner of, the opening 4' are rormed similar brackets 7 and 8'. At the uppercorners of the door 11 are arranged outwardly and rearwardly extending arms 9' and 10. A shaft 15 extends through the brackets 5 and6' so as to turn free therein andthrough the outer ends of the arms 9 and 1-0 where it is rigidly secured by screws 9 and 10 On the endsof said shaft 15 are rigidly secured plmons 16- and 1?. At the lower corners of the door 14' are arranged downwardly and rearwardly extendmg arms 12 and 13' and a shaft-18' extends through the brackets 7 and 8 so as'toturn freely therein and through the outer ends of the arms 12, and 13' where it is rigidly secured by screws 12 and 13 On the ends of said shaft 18 are rigidly'secured pinions 1Q" and 20. At the sides of the door frame arearranged rack bars 21 and 22. These bars are provided at their-upper endswith teeth on their inner faces and attheir lower ends 'withteeth on their outer faces. The bar 21 is arranged so that the upper end thereof is outside of the pinion 16 so that the teeth thereon engage with the said pinion and its lower end is behind the pinion 19." so that theteeth thereon engage with the said pinion. A guide pin 23 is mouhted ontheframe 3" and extends over the bar 21" near its upper end anda guide pin 25' is mounted on the frame 3 andext-ends un-' der the bar 21" near its lower end. -The pins 23 and 25 are preferablygprovided with rollers 27'- and 29' respectivelyll The bar 22 is so arranged that the upper end therof is outside ofthe pinion 17 and its lower end is behind the pinion 20 so that the teeth on the said bar engage vwith the respective pinions. A guide pin 24- is mounted; on the frame 3 and extends over the bar 22' near,

its upper end and a guide pin 26 is mounted on the frame 3' and extends under the bar 22"near itslower end. The said pins 24 and 26' are preferably provided with rollers 28 and 30, respectively. A treadle 35 is operatively mounted on supports 36' and 3 7 and the inner ends of said t-readle are operative-l3 connected with: the rack bars 21 and 22"by rods 31 and 32, respectively.

A spring 38. is preferably arranged under the front end of the treadle.

It will be readily, seen that When the front end of the treadle is depressed the rods 31 and 32 will be pushed up which in turn shove up the rack bars 21' and 22 which by their engagement with the pinions 011 the shafts 15' and 18 cause the said shafts to rotate in opposite directions swinging up the door 11 and swinging down the door 14.

What I claim is,- i

1. In a device for operating furnace doors the combination witha furnace having an opening for the admission of fuel, of a horizontally arranged shaft rotatably mounted 'abovf said opening, a horizmtally arranged shaft iotatably mounted below said opening pinions rigidly secnred on said shafts, a bar slidably mountedat the side of said opening and having one end extending on the inside.

of the pinion on one shaft and having its extending arms rigidly Connected to the 'uph per shaft and the lowe'r door being provided r with downwardly extending arms rigidly connectedwith said lower shaft. 2; Ina device for operating furnace doors,

the combination with a furnace having an zontally arrangedshaft .20

opening forthejadmission of fuel, of a'ho-ri- I rotatably mounted above said'opening, a horizontally arranged shaft rotatably mounted below said opening, pinions "rigidly secure}? eside of said opening and having one end extending on the inside on said shafts, a bar. slidably mounted at t of the pinion on one shaft and having its other end extending on the outside of the pinion on the other shaft, said bar being provided with teeth onopposite faces at opposite ends of said bar adapted to engage with the said pinions, pins arranged to support said bar, one- 0f said pins being an ranged on the outslde of the bar at the end of the barwhich passes on the, outside of the pinion'and the other pin being arranged on the inside of the bar at the end of the bar whiclrpasseson' the inside of the pinion, means *t'orl reclprocatmg sald bar and a pair of doors adapted toelose said opening, the

upperof said doors being provided with'np wardlv extending arms rigidly connectedto the upper shaft and thelower doorbeing provided with downwardly extending arms rigidly connected with thelower shaft.

. In testimony whereof, I Sign the foregoing-specificatiom'in the presence of two witness'es. I

CHARLES F. KAHLER,

Witnesses:

VIo'roR C. LYNCH, N. L. MoDoNNELL.

Copies of this patent may be ohtained-for five cents each, by addressing the Commissioner oi Patents,

r Washington, D. G. v 

